Austria is a German-speaking country in Central Europe, characterized by its mountain villages, baroque city architecture, Imperial history and rugged alpine terrain. Vienna, its Danube River capital, is home to the Schonbrunn and Hofburg palaces, and has counted Mozart, Strauss and Sigmund Freud among its residents. The country’s other notable regions include the northern Bohemian Forest, Lake Traun and eastern hillside vineyards. The origins of modern-day Austria date back to the time of the Habsburg dynasty when the vast majority of the country was a part of the Holy Roman Empire. Today, Austria is a parliamentary representative democracy comprising nine federal states. The capital and largest city, with a population exceeding 1.7 million, is Vienna. Austria is one of the richest countries in the world. Although Austria is cold in the winter (−10 – 0 °C), summer temperatures can be relatively high, with average temperatures in the mid-20s and a highest temperature of 40.5 °C (105 °F) in August 2013. Tourism accounts for almost 9% of the Austrian gross domestic product.